43 lines
928 B
Python
43 lines
928 B
Python
# 集合的创建
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a_set = set(range(8,14))
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#自动去除重复
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b_set = set([0, 1, 2, 3, 0, 1, 2, 3, 7, 8])
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#空集合
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c_set = set()
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# 集合元素的增加与删除
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s = {1,2,3}
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s.add(3)
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s.update({3,4,5})
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s.remove(3)
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print(s)
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# 集合操作
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a_set = set([8, 9, 10, 11, 12, 13])
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b_set = {0, 1, 2, 3, 7, 8}
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# 并集
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print(a_set | b_set,a_set.union(b_set) )
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#交集
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print(a_set & b_set,a_set.intersection(b_set) )
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#差集
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print(a_set.difference(b_set),a_set - b_set)
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# 测试是否为子集
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x = {1, 2, 3}
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y = {1, 2, 5}
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z = {1, 2, 3, 4}
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print(x.issubset(y),x.issubset(z))
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# 使用集合快速提取序列中单一元素
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import random
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listRandom = [random.choice(range(500)) for i in range(100)]
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noRepeat = []
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for i in listRandom :
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if i not in noRepeat :
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noRepeat.append(i)
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print(len(listRandom),len(noRepeat))
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newSet = set(listRandom)
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# 集合推导式
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s = {x.strip() for x in (' he ', 'she ', ' I')}
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print(s) |